Blender Git Loki

Fix threading conflict when doing Cycles background render

It is possible to have same image used multiple times at different frames,
which means we can not free it's buffers without any guard. From quick tests
this seems to be doing what it is supposed to.

Need more testing and port this to 2.79.

Fix T52454: Crash in DEG_graph_on_visible_update when activating scene layer

Most likely needs in 2.79 final release.

Fix T52473: blender internal Fresnel and Layer Weight only work with linked normal.

Please backport this to 2.79.

Fix T52439: Crash after adjusting lenght of hair particles.

Regression from rBfed853ea78221, calling this inside thread worker was
not really good idea anyway, and we already have all the code we need in
pre-threading init function, was just disabled for vertex particles
before.

To be backported to 2.79.

Cleanup: remove space from filenames

Tests: fix incorrect check for hidden dir

Copy-pasted mistake in tests and tools.

Fix error in PointerProperty argument list

Regression in a7b3047

Modify menu from last commit

Also correct tool-tip.

Fix T52434: Restore mesh center of mass calculation

The new method while improved for solid objects
doesn't work for non-manifold meshes, keep both.

Fix bpy library load: invalid function signature

PyAPI: avoid redundant PyLong_AsLong call

Assigning to an RNA array converted from Python to C twice.

fix for angle calculation due to usage of initially rotated rigidbodies in external mode

fix for initial rotation in convert to object and convert to keyframes

fix for rotated box shapes in external mode + print -1 for unbreakable threshold in phys viz

use areabased centroid calculation again for shards + small fix in loading routine

new volumebased method gave incorrect results with nonmanifolds

added an automerge distortion cache

Merge remote-tracking branch 'refs/remotes/origin/blender-v2.79-release' into fracture_modifier

fix attempt for "merge cache"

Fix T52401: "Export Keying Set" operator generated incorrect ID's for shapekeys

To be backported.

Blender 2.79: Point subodules to updated hash